The stale-while-revalidate attribute is used by the Cache-Control header and defines an extra window of time during which a cache (proxy, user agents) can use a stale asset while it revalidates it asynchronously. This improves subsequent page load latencies as stale assets are non longer in the critical path.
Specification
Status in Chromium
Enabled by default (tracking bug) in:
- Chrome for desktop release 75
- Chrome for Android release 75
- Android WebView release 75
Consensus & Standardization
After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.
- Shipped/Shipping
- No signal
- No signal
- Positive
Owners
Intent to Prototype url
Intent to Prototype threadLast updated on 2020-11-09